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Finding the Fourth Proportional to 645.89, 968.84 and 183.68

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Solution

The fourth proportional to 645.89, 968.84 and 183.68 is: 275.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.89 : 968.84 = 183.68 : x
  2. Step 2: Convert to fraction form
    645.89/968.84 = 183.68/x
  3. Step 3: Cross multiply
    645.89x = 968.84 × 183.68
  4. Step 4: Simplify right side
    645.89x = 177,950.77
  5. Step 5: Solve for x
    x = 177,950.77/645.89
  6. Step 6: Final answer
    x = 275.51

Related Problems

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Half scale
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Double scale
Find fourth proportional to 646.89, 970.34 and 184.68
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.